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/* cairo - a vector graphics library with display and print output

 *

 * Copyright © 2009 Intel Corporation

 *

 * This library is free software; you can redistribute it and/or

 * modify it either under the terms of the GNU Lesser General Public

 * License version 2.1 as published by the Free Software Foundation

 * (the "LGPL") or, at your option, under the terms of the Mozilla

 * Public License Version 1.1 (the "MPL"). If you do not alter this

 * notice, a recipient may use your version of this file under either

 * the MPL or the LGPL.

 *

 * You should have received a copy of the LGPL along with this library

 * in the file COPYING-LGPL-2.1; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA

 * You should have received a copy of the MPL along with this library

 * in the file COPYING-MPL-1.1

 *

 * The contents of this file are subject to the Mozilla Public License

 * Version 1.1 (the "License"); you may not use this file except in

 * compliance with the License. You may obtain a copy of the License at

 * http://www.mozilla.org/MPL/

 *

 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY

 * OF ANY KIND, either express or implied. See the LGPL or the MPL for

 * the specific language governing rights and limitations.

 *

 * Contributor(s):

 *	Chris Wilson 

 */

#include "cairoint.h"

#include "cairo-xcb-private.h"

#include 

xcb_pixmap_t

_cairo_xcb_connection_create_pixmap (cairo_xcb_connection_t *connection,

				     uint8_t depth,

				     xcb_drawable_t drawable,

				     uint16_t width,

				     uint16_t height)

{

    xcb_pixmap_t pixmap = _cairo_xcb_connection_get_xid (connection);

    assert (width > 0);

    assert (height > 0);

    xcb_create_pixmap (connection->xcb_connection,

		       depth, pixmap, drawable,

		       width, height);

    return pixmap;

}

void

_cairo_xcb_connection_free_pixmap (cairo_xcb_connection_t *connection,

				   xcb_pixmap_t pixmap)

{

    xcb_free_pixmap (connection->xcb_connection, pixmap);

    _cairo_xcb_connection_put_xid (connection, pixmap);

}

xcb_gcontext_t

_cairo_xcb_connection_create_gc (cairo_xcb_connection_t *connection,

				 xcb_drawable_t drawable,

				 uint32_t value_mask,

				 uint32_t *values)

{

    xcb_gcontext_t gc = _cairo_xcb_connection_get_xid (connection);

    xcb_create_gc (connection->xcb_connection, gc, drawable,

		   value_mask, values);

    return gc;

}

void

_cairo_xcb_connection_free_gc (cairo_xcb_connection_t *connection,

			       xcb_gcontext_t gc)

{

    xcb_free_gc (connection->xcb_connection, gc);

    _cairo_xcb_connection_put_xid (connection, gc);

}

void

_cairo_xcb_connection_change_gc (cairo_xcb_connection_t *connection,

				 xcb_gcontext_t gc,

				 uint32_t value_mask,

				 uint32_t *values)

{

    xcb_change_gc (connection->xcb_connection, gc,

		   value_mask, values);

}

void

_cairo_xcb_connection_copy_area (cairo_xcb_connection_t *connection,

				 xcb_drawable_t src,

				 xcb_drawable_t dst,

				 xcb_gcontext_t gc,

				 int16_t src_x,

				 int16_t src_y,

				 int16_t dst_x,

				 int16_t dst_y,

				 uint16_t width,

				 uint16_t height)

{

    xcb_copy_area (connection->xcb_connection, src, dst, gc,

		   src_x, src_y, dst_x, dst_y, width, height);

}

void

_cairo_xcb_connection_poly_fill_rectangle (cairo_xcb_connection_t *connection,

					   xcb_drawable_t dst,

					   xcb_gcontext_t gc,

					   uint32_t num_rectangles,

					   xcb_rectangle_t *rectangles)

{

    xcb_poly_fill_rectangle (connection->xcb_connection, dst, gc,

			     num_rectangles, rectangles);

}

void

_cairo_xcb_connection_put_image (cairo_xcb_connection_t *connection,

				 xcb_drawable_t dst,

				 xcb_gcontext_t gc,

				 uint16_t width,

				 uint16_t height,

				 int16_t dst_x,

				 int16_t dst_y,

				 uint8_t depth,

				 uint32_t stride,

				 void *data)

{

    const uint32_t req_size = 18;

    uint32_t length = height * stride;

    uint32_t len = (req_size + length) >> 2;

    if (len < connection->maximum_request_length) {

	xcb_put_image (connection->xcb_connection, XCB_IMAGE_FORMAT_Z_PIXMAP,

		       dst, gc, width, height, dst_x, dst_y, 0, depth,

		       length, data);

    } else {

	int rows = (connection->maximum_request_length - req_size - 4) / stride;

	if (rows > 0) {

	    do {

		if (rows > height)

		    rows = height;

		length = rows * stride;

		xcb_put_image (connection->xcb_connection, XCB_IMAGE_FORMAT_Z_PIXMAP,

			       dst, gc, width, rows, dst_x, dst_y, 0, depth, length, data);

		height -= rows;

		dst_y += rows;

		data = (char *) data + length;

	    } while (height);

	} else {

	    ASSERT_NOT_REACHED;

	}

    }

}

static void

_cairo_xcb_connection_do_put_subimage (cairo_xcb_connection_t *connection,

				       xcb_drawable_t dst,

				       xcb_gcontext_t gc,

				       int16_t src_x,

				       int16_t src_y,

				       uint16_t width,

				       uint16_t height,

				       uint16_t cpp,

				       int stride,

				       int16_t dst_x,

				       int16_t dst_y,

				       uint8_t depth,

				       void *_data)

{

    xcb_protocol_request_t xcb_req = {

	XCB_PUT_IMAGE /* opcode */,

	1 /* isvoid (doesn't cause a reply) */

    };

    xcb_put_image_request_t req;

    struct iovec vec_stack[CAIRO_STACK_ARRAY_LENGTH (struct iovec)];

    struct iovec *vec = vec_stack;

    uint32_t len = 0;

    uint8_t *data = _data;

    int n = 3;

    /* Two extra entries are needed for xcb, two for us */

    int entries_needed = height + 2 + 2;

    req.format = XCB_IMAGE_FORMAT_Z_PIXMAP;

    req.drawable = dst;

    req.gc = gc;

    req.width = width;

    req.height = height;

    req.dst_x = dst_x;

    req.dst_y = dst_y;

    req.left_pad = 0;

    req.depth = depth;

    req.pad0[0] = 0;

    req.pad0[1] = 0;

    if (entries_needed > ARRAY_LENGTH (vec_stack)) {

	vec = _cairo_malloc_ab (entries_needed, sizeof (struct iovec));

	if (unlikely (vec == NULL)) {

	    /* XXX loop over ARRAY_LENGTH (vec_stack) */

	    return;

	}

    }

    data += src_y * stride + src_x * cpp;

    /* vec[1] will be used in XCB if it has to use BigRequests or insert a sync,

     * vec[0] is used if the internal queue needs to be flushed. */

    vec[2].iov_base = (char *) &req;

    vec[2].iov_len = sizeof (req);

    /* Now comes the actual data */

    while (height--) {

	vec[n].iov_base = data;

	vec[n].iov_len = cpp * width;

	len += cpp * width;

	data += stride;

	n++;

    }

    /* And again some padding */

    vec[n].iov_base = 0;

    vec[n].iov_len = -len & 3;

    n++;

    /* For efficiency reasons, this functions writes the request "directly" to

     * the xcb connection to avoid having to copy the data around. */

    assert (n == entries_needed);

    xcb_req.count = n - 2;

    xcb_send_request (connection->xcb_connection, 0, &vec[2], &xcb_req);

    if (vec != vec_stack)

	free (vec);

}

void

_cairo_xcb_connection_put_subimage (cairo_xcb_connection_t *connection,

				    xcb_drawable_t dst,

				    xcb_gcontext_t gc,

				    int16_t src_x,

				    int16_t src_y,

				    uint16_t width,

				    uint16_t height,

				    uint16_t cpp,

				    int stride,

				    int16_t dst_x,

				    int16_t dst_y,

				    uint8_t depth,

				    void *_data)

{

    const uint32_t req_size = sizeof(xcb_put_image_request_t);

    uint32_t length = height * cpp * width;

    uint32_t len = (req_size + length) >> 2;

    if (len < connection->maximum_request_length) {

	_cairo_xcb_connection_do_put_subimage (connection, dst, gc, src_x, src_y,

			width, height, cpp, stride, dst_x, dst_y, depth, _data);

    } else {

	int rows = (connection->maximum_request_length - req_size - 4) / (cpp * width);

	if (rows > 0) {

	    do {

		if (rows > height)

		    rows = height;

		length = rows * cpp * width;

		_cairo_xcb_connection_do_put_subimage (connection, dst, gc, src_x, src_y,

			width, rows, cpp, stride, dst_x, dst_y, depth, _data);

		height -= rows;

		dst_y += rows;

		_data = (char *) _data + stride * rows;

	    } while (height);

	} else {

	    ASSERT_NOT_REACHED;

	}

    }

}

cairo_status_t

_cairo_xcb_connection_get_image (cairo_xcb_connection_t *connection,

				 xcb_drawable_t src,

				 int16_t src_x,

				 int16_t src_y,

				 uint16_t width,

				 uint16_t height,

				 xcb_get_image_reply_t **reply)

{

    xcb_generic_error_t *error;

    *reply = xcb_get_image_reply (connection->xcb_connection,

				  xcb_get_image (connection->xcb_connection,

						 XCB_IMAGE_FORMAT_Z_PIXMAP,

						 src,

						 src_x, src_y,

						 width, height,

						 (uint32_t) -1),

				  &error);

    if (error) {

	free (error);

	free (*reply);

	*reply = NULL;

    }

    return CAIRO_STATUS_SUCCESS;

}